Vehicle-tire.



PATENTED MAY 2, 1905.

P. E. DOOLIT'I'LE.

VEHICLE TIRE.

APPLIGATION FILED MAY 17. 1904.

V Jg 4NITED STATES Patented May 2, 1905.

PATENT OFIuC.

VEHICLE-TIRE..

SPECIFICATION forming part of Letters Patent No. 788,711, dated May 2,1905.

Application filed May 17,1904. Serial No. 208,367.

To @ZZ wiz/0m it 'nw/y concern:

Be it known that I, PERRY ERNEST DooLIT- TLE, a subject of the King ofGreat Britain, residing at Toronto, in the county of York, Province ofOntario, Dominion of Canada, have invented new and useful Improvements iin Vehicle-Tires, of which the following is a specification.

My invention relates to supplemental tires adapted to be used inconjunction with pneumatic-tired wheels; and its object is to providesuch a construction of supplemental tire and supporting-rim therefor asmay be readily applied to and detached from the rim or felly of thewheel and used in place of the pneumatic tire either when the pneumatictire is punctured or otherwise injured so as to cause it to collapse orwhen on account of the slippery condition of the road it is desired tosubstitute for the pneumatic tire a hard treadsurface, such as willprevent slipping or skidding of the wheel and at the same time such aconstruction as will enable the supplemental tire when substituted to socoperate with the pneumatic tires of the other wheels of the vehicle asto maintain the true and even bearing of the vehicle upon the surface ofthe road.

To these ends my invention is embodied in preferable `form in theconstruction hereinafter described, and illustrated in the accompanyingdrawings.

1n the drawings, Figure l is a vertical crossseetion of my supplementaltire and rim applied to the felly of a wheel. Fig. 2 is a similar viewillustrating an ordinary pneumatic tire applied to the same kind ot'felly and which may be used on another wheel oi' the same vehicle at thesame time that the supplemental rim and tire are employed on one of thewheels, and Fig. 3 is a longitudinal vertical section broken awaythrough said supplemental tire and rim and the wheelfelly.

The means for attachment of the rim of the pneumatic tire and also ofthe supplemental rim to this felly as shown and described in thisapplication are the same as those set forth in my pending applicationfor United States Letters Patent, Serial No. 182,169, filed N0- vember2l, 1903, for vehicle-tires; but it is clear that my invention may beemployed in connection with other means ol attachment of the rim to thefolly and is not limited in its application to such specific form ot'attachment.

Referring to the drawings, a designates a long circumferential radiallyextending' shank of the supplemental rim of my invention, and bdesignates a broad Hat circumferential base of said rim. This basecorresponds in width to and is adapted to be litted upon the irontire-rim c, which is normally adapted to receive the pneumatic tire.Between the rim c and a ielly Z and mounted in a channel e in the formeris a circumferentially-expansible band f. rlhe inner face of the rim andthe outer face oi' the bandf are provided with corresponding engagingteeth or inclined projections g, which are adapted to ride one upon theother or close together in order to either force the band fout againstthe rim c to clamp the rim to the :telly or to permit the contraction ofthe band in order to release said rim from the lelly and permit it to beremoved therefrom. i

The outer end of the supplemental rim is provided with a widened head t,having a channel c', adapted to receive a solid-rubber tire y', whichmay be of ordinary construction, but which need be but of very slightthickness. If preferred, the supplemental tire j may be almost entirelymade oi some unyielding material and provided with only a slightresilient lining. The band fmay be provided with any suitable means,such as a two-way screw r, for tightening up or releasing the bandagainst the rim.

ln practice should any one of the tires of the diiferent wheels of thevehicle become collapsed by bursting or th'rough a puncture or should itbe desirous to provide means on one of the driving-wheels to preventslipping or skiddingof the wheels on a slippery surface it is merelynecessary to loosen the main tirerim by contracting the band f, by meansof the screw-bolt 7n', and then slipping this main pneumatic-tire rimoli the felly and then placing the supplemental rim with its solid tireor tread-surface already in place on the main tirerim c and againclamping the tire-rim to the t'elly by means oi" the expansible band f.

IOO

The construction of the supplemental rim is such hat with a smalltread-surface the bearing-periphery of the Wheel to Which thesupplemental tire and rim may be attached is carried out to the level ofthe bearing-surface of the pneumatic tire, and hence the supplementalrim and tire will coperate with lthe tires of the other Wheels tomaintain a true bearing of the vehicle-wheels,While at the same timeavoiding a hard non-slipping and a nonpuncturable tread-surface for thewheel to Which it is applied.

It is clear that changes may be made in the details of the devicewithout departing from the scope of my invention.

Havingthus described my invention, what I claim is- 1. In a vehicleadapted to be provided with pneumatic tires a removable supplementalrim, means to attach said rim to the felly or rim of the pneumatic tireWhen the pneumatic tire is removed, said supplemental rim having ahard-surfaced tread portion and having1 a radially-extending connectingportion between the tread portion and the base projecting outward tocarry the hard-surfaced tread portion to the same distance from thecenter of the Wheel as the periphery of the pneumatic tire,substantially as described.

2. In a vehicle employing pneumatic tires in combination with the Wheelsof said vehicle and pneumatic tires on one or more of said Wheels asupplemental rim carrying a hard tread portion, vmeans to' tit saidsupplemental rim on the Wheel-rim or felly in place of the pneumatictire a base for said supplemental rim a tread-portion-holding part and aradially-extending connecting part between the base and tread holdingpart of suficient length to carry said tread portion out to thebearing-level of the periphery of said other pneumatic tires,substantially as described.

In testimony whereof I have signed my name to this speciiication in thepresence of tWo subscribing witnesses.

PERRY ERNEST DOOLITTLE.

Witnesses:

MARGARET A. GLEEsoN, JAs. P. MAoGREGoR.

